Hacks for multilib unclean C headers

[Pavel Raiskup]

Just wanted to ping here about one packaging helper [1], which is stuck in
some (possibly infinite/priority) queue without any review.

In database packages we have that multilib hack for a very long time,
mostly C&P'ed among various spec files.  Having this in redhat-rpm-config
could make that more solid, maintained at one place.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1286193
[2] https://fedoraproject.org/wiki/PackagingDrafts/MultilibTricks

It is probably possible to package this separately, so I'm ready to have a
special package for database purposes.  But who knows, maybe it is a time
to drop that idea at all?

Pavel